/*
  将下面异步代码使用 Promise 的方法改进
  尽量用看上去像同步代码的方式
  setTimeout(function () {
    var a = 'hello'
    setTimeout(function () {
      var b = 'lagou'
      setTimeout(function () {
        var c = 'I ♥ U'
        console.log(a + b +c)
      }, 10)
    }, 10)
  }, 10)
*/

new Promise(resolve => {
    setTimeout(() => {
        let a = 'wo'
        setTimeout(() => {
            let b = 'wangtao'
            setTimeout(() => {
                let c = 'so cool'
                resolve(a+b+c)
            },1000)
        },1000)
    },1000)
}).then(res => {
    console.log(res);
})

